Will apple still refund my £25 if I go to the store? I don't see why not, they can tell it's a real bumper.
Check your email? I know I get receipts from the Apple Store emailed to me when I use the credit card I have attached to iTunes.
I bet that you will be able to. They will probably make us bring our iphones in and tie our serial numbers to the refund. That's what they did with the power adaptors.
I paid cashfor the bumper. So I got a printed receipt. They didn't ask for my apple ID. I'll call in store. If I can't get a refund I'll just claim another free case. I wasn't expecting the money back so I don't feel like I'm loosing out really. I'll request a different 3rd part case. Different to bumper then.
You know, now that I think about it, the first time I went into an Apple Store, I gave them my credit card, and that's when they asked me if I wanted it e-mailed to me. I said "sure", and since then everytime I give them my credit card they ask me the same question. It must be tied to the credit card. So, if you paid cash they would have never asked you that as they wouldn't have a quick way to tie the info over to you. As you say, you can simply get a free case instead, I have two bumpers and a case. Variety is the spice of life, and we want to have fun with our toys, right?